Aviation

Go through this article about commercial pilot training for your answer
https://www.shiksha.com/career-in-commercial-flying-all-you-need-to-know-article-13472-1

No particular stream is required for admission.
Frankfinn is a good institute to provide basic soft skills, interview prep & industry knowledge but do not rely on any institute placements. You need to work hard yourself.
Some of their most famous courses are HTCS, AHTM and the fee ranges between 85k to 1.80 lacs.

The minimum eligibility criteria is class 12th with maths and physics.

Yes, definitely you are eligible to apply CPL after +2 with science stream. But, you need to have a good amount of money.
In my opinion, after +2, PPL is better. After doing this, go for CPL and ground handling, etc.
All the best.

Eligibility Criteria:
Good in spoken English
18-26 years of age.
10+2 with a degree in hospitality, or another graduate degree.
Height: A minimum of 155 centimetres, weight proportionate to the height for girls.
Height: A minimum of 170 centimetres, weight proportionate to the height for boys.
Eligible for an Indian passport.
Unmarried
Perfect eyesight
Good health
Clear complexion

You can get lots of jobs like cabin crew management, ground staff management, HR jobs, etc. The salary initially will be less, but it will go up with experience. Approximately, 20k will be your earning initially.

An aircraft maintenance engineer keeps aircraft in working order through maintenance, repairs and inspections. The Federal Aviation Administration, or FAA, regulates mechanical work on aircraft, and individuals entering this field must meet specific training and certification requirements. Aircraft maintenance engineers must be prepared to carefully follow FAA regulations and work long hours on emergency repairs.

Hello Piyush,
From what you have said, this course does not appear to be of engineering Graduation. But it's a course about aircraft maintenance leading to graduation and most importantly, enabling the student to obtain license from DGCA.Even if college is not giving scholarships, you can get education loan.

Hi,
The general eligibility criterion for an air hostess in a majority of airlines is as follows:
(a) 10+2 cleared from a recognized board of education. Some airlines prefer graduates.
(b) Age of candidate should be between 18 to 25 years.(c) Min. height required is 157.5 cm and weight should be in proportion to height.(d) Good communication skills with mastery over spoken Hindi, English.
Foreign language certification will be a good additional qualification.